The 490128A is a the manufacturer industrial component. Key specifications include material: PLASTIC METHYL METHACRYLATE SCALE, scale_type: HORIZONTAL AND VERTICAL, overall_diameter: 2.875 INCHES NOMINAL IN, overall_thickness: 0.020 INCHES NOMINAL IN, mounting_configuration: 3 RADIAL MTG TABS 120 DEG APART WHICH SLIP BETWEEN TUBE AND VISOR, end_item_identification: TYPE OS-8A/U A. This product is currently in active production with full OEM support.
This part is cataloged in the Federal Logistics Information System under NSN 6625-00-669-8742, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.
Verify compatibility with your specific system configuration before ordering.
| material | PLASTIC METHYL METHACRYLATE SCALE |
| scale_type | HORIZONTAL AND VERTICAL |
| scale_quantity | 2 |
| overall_diameter | 2.875 INCHES NOMINAL IN |
| overall_thickness | 0.020 INCHES NOMINAL IN |
| mounting_configuration | 3 RADIAL MTG TABS 120 DEG APART WHICH SLIP BETWEEN TUBE AND VISOR |
| end_item_identification | TYPE OS-8A/U A |
| scale_division_quantity | 10 |
| NSN | 6625-00-669-8742 |
| SCALE QUANTITY | 2 |
| MOUNTING CONFIGURATION | 3 RADIAL MTG TABS 120 DEG APART WHICH SLIP BETWEEN TUBE AND VISOR |
| END ITEM IDENTIFICATION | TYPE OS-8A/U A |
| OVERALL DIAMETER | 2.875 INCHES NOMINAL IN |
| SCALE DIVISION QUANTITY | 10 |
| OVERALL THICKNESS | 0.020 INCHES NOMINAL IN |
| SCALE TYPE | HORIZONTAL AND VERTICAL |
| MATERIAL | PLASTIC METHYL METHACRYLATE SCALE |
| SCALE QUANTITY | 2 |
| MOUNTING CONFIGURATION | 3 RADIAL MTG TABS 120 DEG APART WHICH SLIP BETWEEN TUBE AND VISOR |